Safety cut-out



H. F. KRANTZ. SAFETY cumu.

APPLICATION FILED`APR. 6,1915. 1,399,489'.

3 SHEETS-SHEET l- A' TTU/MEV 13mm/ted Dec. 192L if. KiN'/Q. SAFETY CUT-OUT. APPLICATION FILED APR. e, 1916.

Patented Dee. 6, 1921.

3 SHEETS*SHEET 2.

n mi@ ATTORNEY SAFETY CUTOUT. APPLICATION FILED APR. e, 19m.

3 SHEETSSHEET 3.

siion oi ewiicii. residing e d new iiiveieei i: i A 1 1 1 o; Welch remover; @no ieoii mii disby iie eri'ows man i ine oim iii Wi have iilustmed i *die modifie ions Thus.7 if. i obsruet mees@ TT mere, this casiiic'- lf;

ferire@ of e b'- f n a Special De `eceessi'eie when' o.. J -iiieve been iii-st porio';

if ine Circuit, as in epioii or Shield nich iies out of iie ey aiiimgement. Way when 'fi-,he dooiis nosed and enables the 'on not Switch bied :Lvonecb with the iive with means main-Hue. j and :vet which 'if-Likes iisiieoiori of n.11 :in obsiiiioiiiig position, operating es bm'- 85 the time iiei o prevent che imno from coiiaciiiig bo demi iiuiing Wii-h se'y eifniiei when tion or repair. This is imfieistood by i iei' oi'ijeets iii be in pmi obvious from showingiii 35 iie :liiiiozieci @savings anni in pari indicated tions i: \e

' iieievvibii oy the foiiowing piovid-A l invention. f which iie acooieiingiy consists in the This ie i connected in any iieatoi" Struoion, combio Lion of suabie witi .a ii veline conductor 43 parte and iii the unique sia-tions oi' .the l0, as by ineens of -iie s p l, which rims 95 ie eiaiiife pioportioning and Cioseiy underneath die setionziij! top 6. Iiiisposiiti reof; ail moie'compleeiy The swich device is pieifei'abiy so mountuiiied iiei f ed that it will be shifted into n more nenes- 'o eimoie ,i iii the so iiiiy sible position iliiheneve'i lie door is opened, to ceropieii A .iig features and convenient manner of doin0V this is to 100 f embody the same by mount the same directiy on said doei', Thus, ifie mansions modieoions iiil stiuetuie ibis switch device consists of im me D, po und reieion contemplated oy this inveiiaion, sitioned on the Cover B by means o'fsiids 1.2, drawings iiepiciiig a preferred form have so that' the Swinging swigch blade oi' brush 50 been annexed as e @mi o this disclosure` may make Contact with themaiii-ine termi 105 ami in such drawings; like' characters m11 C on the one hand an@ 'with iie branchrelfeienee denote ool'iesfoiiiig parts line ermine 'E on fue other hand. This threugiiout eiif'iiie We; of Whiehz 1oush F is p'eerabiy pivoeci by being Figuie 1 'is e ioniii. side elevation o'f clamped io e loeker 13 which swings ebou fois meciiaiism snowing pelis in full 'veiee pivot le. The bied-e F is of lemi- 11e Lei-ring 'to Fig. i. dotefi iiies die su "sive posirihe apron is 90` i. y 2i) through mmol C norma y protrudes.

noted construction, being termed oi successive layers of copper sheets, clamped'together near their middle by means o'i` rivets and thereby secured to the rocker 13. s spring l5," tends constantly to throw the switch into its neutral position as indicated in dotted lines in l? 3 and this movement may he prevented hy means ot a toggle formed ot linlrs G and H. Link ll swings about the fixed pivot if?. and is connecten by means of the moving I"pivot 18 to the ioating link G which in turn is connected at i9 to the rocker 13. The pin 20 serves to holdv the toggle slightly over its deadcenter position when it is erected and thus flex the resilient brushv against its terminals. ly reason of the resiliency of this brush no diiiiculty arises when the switch device is displaced bodily since lthis construction precludes the necessity of accurate alinernent ot parte. The toggle may be broken or erected by means of a sp ci il; hey 29 adapted to he in sorted through the keyhole from the exterior of the door B.y in breaking the tog'- qle the swinging extremity ot the hey will impact the shoulder 2l ot the link G thereby swinging it antinclocluvise over its dead center, and this will then allow the spring itl to exert itself and throiv thetoggle into the dotted line position indicated by Fig. 3; thereby moving the switch. into its open circuit position. @n the other hand, with the parts in this position, the tree end ot the key may swing` against the shoulder 23 by a reverse movement and restore the parts to their initial erected position. ".lhe angular relation ot the'shoulders 2l and 23 to each other pro ide spaced legs, as of a bellcrank upon the link lvl, so that the ley is tree to play Within the space between the legs and is operable to swing' the bell-crank in either direction according as the, hey is turned against one leg or the other.

It .will be observed that when the brush F is in the closed circuit position, the door cannot he opened, because the end ot the brush adjacent the terminal E lies underneath the Alip 2l ot the stationary cover which would obstruct its upward rise. lWhen in open circuit position, however, the brush clears said lip. and the door may readily be opened.

This invention furthermore proposes an arrangement. for automatically operating; a switch device under special conditions, as for example, when a load v: ries from the normal. Thus, l indicates a solenoid formed ot a few turns of heavy copper wire arranged invseries with the branclrline circuit and the terminal E. Should thefcurrent become es: cessive this solenoid will pull the plunger L to the right andthis plunger is in turn niv@ oted to a lever M oivoted at 25 to the frame 26 so that the opper end 27 ot the lever may move igainst the extension 28 of the link and string it about the pivot l? so as to'breali the toggle. The adjacent ends of the parts 2T and 28 are shown beveled to prevent the lever 27 troni catching under the part Q8 and interfere with the closing ot the door.

lWithout further an sis, the foregoing -ill so fully reveal the ,cjist of this invention that others can by applying current knowledge readily adapt it tor various applica.- t-ions without omitting' certain features that, from the standpoint of the prior art, -tairly constitute essential characteristics o'f the generic or specific aspects of this invention, and therefore such adaptations should and are intended to oe comprehendcd within the meaning and range of equivalency ot the following claims. Having thus revealed this invention, l claim as new and desire to secure the tollowing combinations of elements, or equivalents thereot, hy Letters Patent of the 'United tltateszl. switch mechanism combining a housing having an opening thereinto, a door tor said opening hinged to swing; into open and closed positions, a switch mechanism arranged within the housing, said switch inecnanism including,- a switch blade pivotl ally-fsupportedbythe door upon an axis extendingr transverse of the axis ot' the door hinge, and means to swing the switch blade into and out a `position in which the switch blade constitutes "retaining means tor the door.

2. A switch mechanism combining a housing having; an opening thereinto, a door for said opening, hinged to swing' into open and closed positions, a switch mechanism arranged Within the housing, said switch mechanism inc-lading a switch blade pivot ally supportedby the door upon an axis ci;i tending transverse ot the anis ot the door hinge, a contact carried hy the housing beA yond the margin oi the door, nieansto swing the switch blade into and out otposition projecting beyond the inargin of the door and into engagement With Said contact, thus 'to directly constitute the switch blade as a retaining ineens for .the door when the switch bladeis in engagement with said contact.

n a sivitch mechanism comprising a housing having a displaceable cover, a 'switch device Within the housing accessible When said cover is displaced, said switch device being operable into on and ott positions, and rneans whereby the cover may not be displaced while the switch device is on, the combination there-With oiI a key, and means adapted to be controlled thereby for operating said switch de ice into its on and oil positions.'

tulo a. switch mechanism comprisingI a housing having s -displaceable cover," a switch :devicef the housing acnin lli)

Lesa/eee cessible when said cover is displaced, said switch devioe being operable into on and ofi positions, and means Whereby the cover maj,7 not be displaced While the switch device is om the combination therewith of keg'v controlled @eerst` ing means carried by said cover for oper ating said switch device into on and off positions, a key, and the cover having an aperture therethrough tor the insertion of the key to operate said operating means.

5. A Switching device comprising a housing having a cover provided with an opening, a.' door for said opening hinged to swing into open and closed positions, a switch blade Within the housing having a part movable into engagement with the cover and serving to retain the door closed, av toggle also within the housing operable into Lmade and brokenWpositions and adapted, when in made position, to loci; the switch blade in retaining position, and means to operate the toggle.

6. A switching device comprising housing having a cover provided with an open ing, a door for said opening hinged to svvinc into open and ciosed positions, a switoll lade Within the housing and having a part movable into engap'ement with the cover and serving to retain tne door closed, and a part movable with the door and operable to lock the switch blade in its retaining position.

T. A switching device comprising housing having a cover provided vvith an opening, a door for said opening hinged to swing into open and closed positions, a switch blade carried by, and movable with, the door Within the housing and having a part that is movable into engagement with the cover and serving to reta-in the door closed, and means for locking the switch blade in its retaining position.

S. switching device comprising housing; having' an opening therein, a door `for said opening hinged to swing into open and closed positions, a switch blade Within the housing, the door being arranged to swing upon a relatively verticalvaxis, the switch blade being so pivotally mounted upon the door on a horizontal airis to swing in a plane substantially parallel to the plane of the inner surface ofthe door, tlie switch blade having a part that, in one position or the switch blade, coperates with a portion ofthe housing to retain the door closed, and means to lock the switch blade in sail` last mentioned position.

9. A switching device comprising a pair of separate contact members, a movable support pivoted for rot-ary movement into operative and inoperative positions, switch blade member pivoted to the support for rotary movement about an axis disposed subation of the supportd ldag ted, 'when the support is in operative position, to be rotated inte and out of engagement with the said Contact members, and means for preventn ing movement of the support out o? operetive position while blade member is in engagement with the Contact members.

l0. A switching device comprising a pair of separate Contact members, a movable support pivoted for rot-ary movement into operative4 and inoperative positions, a switch blade member pivoted to the support for rotary movement about an anis disposed substantially normal to the axis ot rotation of the support and adapted, when the support is in operative position, to be rotated into and out oic engagement with the said cont-act members, means for preventing movement of the Support out ci operative position While the blade member is in engagement with the Contact members, and means for holding the blade member in engagement with the contact members.

11. l switching device comprising a pair ot separate contact members, a movable su pport pivoted for rotary movement into operative and inoperative positions, a switch blade member pivoted to the support for rotary movement about an axis disposed sub-l stantially normal to the axis of rotation of the support and adapted, when the supportis in operative position, to "oe rotated into and out o' engagement with the said Contact members, means for normally holdin the blade member out of engagement with the Contact member, means including a toggle for operating the blade member into and out of engagement with the Contact member and for holding the blade member in engagement with the Contact members, and means for preventing movement of the support out ot operative oosition while the blade meinber is in engagement with the contact niembers.

12. :i switching device comprising a housing having a cover provided with an openingn therein, a door for said opening hinged to swing into open and closed fpositions, a

lswitch blade located Within the housing and carried by the said door and having a part v that is movable into and out of position beneath the cover to retain the door closed and means carried by the door Jfor moving the switch blade and for locking the switch 

